<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <!-- 黑马logo -->
        <img src="../assets/heima.png" alt />
        <!-- 顶部标题 -->
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px' ">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu
          background-color="#333744"
          text-color="#0162CB"
          active-text-color="#FD70B9"
          unique-opened
          :collapse="isCollapse"
          router
          :default-active = "activePath"
        >
          <!-- 一级菜单 -->
          <!-- index的属性值只能是字符串并且只能是唯一的 所以利用隐式转换和item的ID-->
          <el-submenu :index="item.id + ''" v-for="item in meunlist" :key="item.id">
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级子菜单 -->
            <el-menu-item
              :index=" '/' +subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
           
            >
               <!-- @click="saveNavState('/'+subItem.path)" -->
              <!-- 二级菜单模板 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-s-flag"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体结构 -->
      <el-main>
        <router-view />
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      meunlist: [],
      iconsObj: {
        "125": "iconfont icon-user",
        "103": "iconfont icon-tijikongjian",
        "101": "iconfont icon-shangpin",
        "102": "iconfont icon-danju",
        "145": "iconfont icon-baobiao"
      },
      isCollapse: false,
      activePath: ''
    };
  },
  created() {
    this.getMenuList();
    // window.sessionStorage.getItem("activePath")
    this.activePath = this.$route.path
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status != 200) return this.$message.error("数据获取失败");
      this.meunlist = res.data;
    },
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // saveNavState(path ) {
    //   window.sessionStorage.setItem('activePath', path)
    //   this.activePath = path
    // }
  }
};
</script>
<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 22px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  //  使用element的时候el-aside里面的el-menu会有一个小BUG多一像素边框把它取消就好了
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
i {
  margin-right: 10px;
}
.toggle-button {
  background-color: #333744;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>